Note 2 - Accounting Policies (Detail) - Financial Data for Variable Interest Entities (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2012	Mar. 31, 2011
Revenue	$ 17,252	$ 13,879
Gross profit	2,854	1,850
Net income	$ 633	$ 29

Amount of the consolidated Variable Interest Entity's gross profit included in the reporting entity's statement of financial position.

No definition available.

Name:	aegn_VariableInterestEntitiesSummarizedFinancialInformationGrossProfitLoss
Namespace Prefix:	aegn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration